diff --git a/aptos-move/aptos-gas-schedule/src/ver.rs b/aptos-move/aptos-gas-schedule/src/ver.rs
index 41a42ce3cbcbb..ad23e4d850b8f 100644
--- a/aptos-move/aptos-gas-schedule/src/ver.rs
+++ b/aptos-move/aptos-gas-schedule/src/ver.rs
@@ -72,7 +72,7 @@
 ///       global operations.
 /// - V1
 ///   - TBA
-pub const LATEST_GAS_FEATURE_VERSION: u64 = gas_feature_versions::RELEASE_V1_26;
+pub const LATEST_GAS_FEATURE_VERSION: u64 = gas_feature_versions::RELEASE_V1_27;
 
 pub mod gas_feature_versions {
     pub const RELEASE_V1_8: u64 = 11;
diff --git a/aptos-move/aptos-release-builder/data/release.yaml b/aptos-move/aptos-release-builder/data/release.yaml
index 891bece480d33..90d6dbf99dcbc 100644
--- a/aptos-move/aptos-release-builder/data/release.yaml
+++ b/aptos-move/aptos-release-builder/data/release.yaml
@@ -1,19 +1,20 @@
 ---
 remote_endpoint: https://fullnode.mainnet.aptoslabs.com
-name: "TBD"
+# replace with below for actual release, compat test needs concrete URL above:
+# remote_endpoint: ~
+name: "vX.YY.Z"
 proposals:
   - name: proposal_1_upgrade_framework
     metadata:
-      title: "Multi-step proposal to upgrade mainnet framework, version TBD"
-      description: "This includes changes in (TBA: URL to changes)"
+      title: "Multi-step proposal to upgrade mainnet framework, version vX.YY.Z"
+      description: "This includes changes in https://github.com/aptos-labs/aptos-core/releases/tag/aptos-node-vX.YY.Z"
     execution_mode: MultiStep
     update_sequence:
       - Gas:
           new: current
+          # replace with below for actual release, above "current" is needed for compat tests:
+          # old: https://raw.githubusercontent.com/aptos-labs/aptos-networks/main/gas/vX.WW.Z.json
+          # new: https://raw.githubusercontent.com/aptos-labs/aptos-networks/main/gas/vX.YY.Z.json
       - Framework:
           bytecode_version: 7
           git_hash: ~
-      - FeatureFlag:
-          enabled:
-            - allow_serialized_script_args
-
diff --git a/aptos-move/aptos-release-builder/src/components/mod.rs b/aptos-move/aptos-release-builder/src/components/mod.rs
index 745125cde95e3..1ecfdd4125ed3 100644
--- a/aptos-move/aptos-release-builder/src/components/mod.rs
+++ b/aptos-move/aptos-release-builder/src/components/mod.rs
@@ -599,21 +599,41 @@ impl ReleaseConfig {
 
         source_dir.push("sources");
 
-        std::fs::create_dir(source_dir.as_path())
-            .map_err(|err| anyhow!("Fail to create folder for source: {:?}", err))?;
+        std::fs::create_dir(source_dir.as_path()).map_err(|err| {
+            anyhow!(
+                "Fail to create folder for source {}: {:?}",
+                source_dir.display(),
+                err
+            )
+        })?;
 
         source_dir.push(&self.name);
-        std::fs::create_dir(source_dir.as_path())
-            .map_err(|err| anyhow!("Fail to create folder for source: {:?}", err))?;
+        std::fs::create_dir(source_dir.as_path()).map_err(|err| {
+            anyhow!(
+                "Fail to create folder for source {}: {:?}",
+                source_dir.display(),
+                err
+            )
+        })?;
 
         let mut metadata_dir = base_path.to_path_buf();
         metadata_dir.push("metadata");
 
-        std::fs::create_dir(metadata_dir.as_path())
-            .map_err(|err| anyhow!("Fail to create folder for metadata: {:?}", err))?;
+        std::fs::create_dir(metadata_dir.as_path()).map_err(|err| {
+            anyhow!(
+                "Fail to create folder for metadata {}: {:?}",
+                metadata_dir.display(),
+                err
+            )
+        })?;
         metadata_dir.push(&self.name);
-        std::fs::create_dir(metadata_dir.as_path())
-            .map_err(|err| anyhow!("Fail to create folder for metadata: {:?}", err))?;
+        std::fs::create_dir(metadata_dir.as_path()).map_err(|err| {
+            anyhow!(
+                "Fail to create folder for metadata {}: {:?}",
+                metadata_dir.display(),
+                err
+            )
+        })?;
 
         // If we are generating multi-step proposal files, we generate the files in reverse order,
         // since we need to pass in the hash of the next file to the previous file.
@@ -623,8 +643,13 @@ impl ReleaseConfig {
             proposal_dir.push(&self.name);
             proposal_dir.push(proposal.name.as_str());
 
-            std::fs::create_dir(proposal_dir.as_path())
-                .map_err(|err| anyhow!("Fail to create folder for proposal: {:?}", err))?;
+            std::fs::create_dir(proposal_dir.as_path()).map_err(|err| {
+                anyhow!(
+                    "Fail to create folder for proposal {}: {:?}",
+                    proposal_dir.display(),
+                    err
+                )
+            })?;
 
             let mut result: Vec<(String, String)> = vec![];
             if let ExecutionMode::MultiStep = &proposal.execution_mode {
@@ -657,7 +682,13 @@ impl ReleaseConfig {
                 script_path.set_extension("move");
 
                 std::fs::write(script_path.as_path(), append_script_hash(script).as_bytes())
-                    .map_err(|err| anyhow!("Failed to write to file: {:?}", err))?;
+                    .map_err(|err| {
+                        anyhow!(
+                            "Failed to write to file {}: {:?}",
+                            script_path.display(),
+                            err
+                        )
+                    })?;
             }
 
             let mut metadata_path = base_path.to_path_buf();
@@ -669,7 +700,13 @@ impl ReleaseConfig {
                 metadata_path.as_path(),
                 serde_json::to_string_pretty(&proposal.metadata)?,
             )
-            .map_err(|err| anyhow!("Failed to write to file: {:?}", err))?;
+            .map_err(|err| {
+                anyhow!(
+                    "Failed to write to file {}: {:?}",
+                    metadata_path.display(),
+                    err
+                )
+            })?;
         }
 
         Ok(())